You can call this operation to bind an elastic network interface (ENI) to an ECS instance in a VPC.

Description

When you call this operation, take note of the following items:

  • The ENI must be in the Available (Available) state. Each ENI can be bound to a single instance.
  • The instance must be in the Running (Running) or Stopped (Stopped) state. When you bind ENIs to instances of some instance types, the instances must be in the Stopped (Stopped) state. For more information, see Shared instance families and Burstable instance overview.
    Note If the last start time of the instance (including the last start time of the instance if it is newly purchased, the last restart time of the instance, and the last reactivation time of the instance) is before April 1, 2018 and the instance stays in the Running state, you must call the RebootInstance operation to restart the instance. Otherwise, the ENI cannot be bound to the instance.
  • You can bind multiple ENIs to a single instance. For information about the maximum number of ENIs that can be bound to instances of each instance type, see ENI overview.
  • The instance must be in the same zone and the same VPC as the VSwitch to which the ENI is connected.

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String Yes AttachNetworkInterface

The operation that you want to perform. Set the value to AttachNetworkInterface.

InstanceId String Yes i-bp16qstyvxj9gpqw****

The ID of the instance.

NetworkInterfaceId String Yes eni-bp17pdijfczax1huji****

The ID of the ENI.

RegionId String Yes cn-hangzhou

The region ID of the instance. You can call the DescribeRegions operation to query the most recent region list.

Response parameters

Parameter Type Example Description
RequestId String 473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E

The ID of the request.

Examples

Sample requests

https://ecs.aliyuncs.com/?Action=AttachNetworkInterface
&RegionId=cn-hangzhou
&InstanceId=i-bp16qstyvxj9gpqw****
&NetworkInterfaceId=eni-bp17pdijfczax1huji****
&<Common request parameters>

Sample success responses

XML format

<AttachNetworkInterfaceResponse>
      <RequestId>473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E</RequestId>
</AttachNetworkInterfaceResponse>

JSON format

{
    "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E"
}

Error codes

HTTP status code Error code Error message Description
403 InvalidUserType.NotSupported %s The error message returned because your account does not support this operation.
403 Abs.InvalidAccount.NotFound %s The error message returned because your Alibaba Cloud account does not exist or your AccessKey pair has expired.
400 MissingParameter %s The error message returned because a required parameter is not specified.
403 Forbidden.NotSupportRAM %s The error message returned because RAM users are not authorized to perform this operation.
400 UnsupportedParameter %s The error message returned because a specified parameter is not supported.
403 Forbidden.SubUser %s The error message returned because your account is not authorized to manage the specified resource. Contact the owner of the Alibaba Cloud account for authorization.
400 InvalidParameter %s The error message returned because a specified parameter is invalid.
400 InvalidInstanceID.Malformed %s The error message returned because the specified InstanceId parameter is invalid.
400 InvalidOperation.InvalidRegion %s The error message returned because the specified RegionId parameter is invalid.
400 InvalidOperation.InvalidEcsState %s The error message returned because the operation is not supported while the instance is in the current state.
400 InvalidOperation.InvalidEniState %s The error message returned because the operation is not supported while the ENI is in the current state.
400 InvalidOperation.DetachPrimaryEniNotAllowed %s The error message returned because you cannot unbind the primary ENI from the instance.
404 InvalidEcsId.NotFound %s The error message returned because the specified InstanceId parameter does not exist.
404 InvalidEniId.NotFound %s The error message returned because the specified NetworkInterfaceId parameter does not exist.
404 InvalidVSwitchId.NotFound %s The error message returned because the specified VSwitch ID does not exist.
404 InvalidSecurityGroupId.NotFound %s The error message returned because the specified security group ID does not exist.
403 MaxEniCountExceeded %s The error message returned because the maximum number of ENIs that can be managed has been reached.
403 EniPerInstanceLimitExceeded %s The error message returned because the maximum number of ENIs that can be bound to the specified instance has been reached.
403 InvalidOperation.AvailabilityZoneMismatch %s The error message returned because the operation is invalid.
403 InvalidOperation.VpcMismatch %s The error message returned because the operation is invalid. Check whether the VPC in the operation corresponds to other parameters.
403 SecurityGroupInstanceLimitExceed %s The error message returned because the maximum number of instances in the specified security group has been reached.
403 InvalidSecurityGroupId.NotVpc %s The error message returned because the specified SecurityGroupId parameter is invalid and the security group is not of the VPC type.
403 InvalidOperation.InvalidEniType %s The error message returned because the ENI type does not support this operation.
400 Forbidden.RegionId %s The error message returned because the service is not available in the current region.
403 InvalidInstanceId.NotFound %s The error message returned because the specified InstanceId parameter does not exist.
400 InvalidOperation.InvalidGeneration %s The error message returned because the operation is invalid.
400 InvalidParams.EniId %s The error message returned because the specified NetworkInterfaceId parameter is invalid.
403 InvalidOperation.Ipv4CountExceeded %s The error message returned because the maximum number of IPv4 addresses has been reached.
403 InvalidOperation.EniServiceManaged %s The error message returned because the operation is invalid.
403 InvalidOperation.Ipv6NotSupport %s The error message returned because IPv6 does not support this operation.

For a list of error codes, visit the API Error Center.